Application: kwin_x11 (5.14.4)

Qt Version: 5.12.0
Frameworks Version: 5.53.0
Operating System: Linux 4.12.14-lp150.12.28-default x86_64
Distribution: "openSUSE Leap 15.0"

-- Information about the crash:
- What I was doing when the application crashed:

i was switching between applications

- Unusual behavior I noticed:

nothing unusual, but i had an openGL game running in a window.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f107c0ce940 (LWP 3595))]

Thread 7 (Thread 0x7f104b398700 (LWP 14681)):
#0  0x00007f10749eb89d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1078da970b in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55e2167a4c50) at thread/qwaitcondition_unix.cpp:146
#2  0x00007f1078da970b in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55e218a23f90, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007f1078da9a19 in QWaitCondition::wait(QMutex*, unsigned long) (this=0x55e218a23f98, mutex=0x55e218a23f90, time=<optimized out>) at thread/qwaitcondition_unix.cpp:208
#4  0x00007f1073b8c3d8 in  () at /usr/lib64/libQt5Quick.so.5
#5  0x00007f1073b8c80a in  () at /usr/lib64/libQt5Quick.so.5
#6  0x00007f1078da2782 in QThreadPrivate::start(void*) (arg=0x55e218a23f10) at thread/qthread_unix.cpp:361
#7  0x00007f10749e5559 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f107ba6081f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f105991d700 (LWP 14680)):
#0  0x00007ffd9874db27 in clock_gettime ()
#1  0x00007f107ba6e106 in clock_gettime () at /lib64/libc.so.6
#2  0x00007f1078fd7591 in qt_clock_gettime (ts=0x7f105991caa0, clock=<optimized out>) at kernel/qelapsedtimer_unix.cpp:111
#3  0x00007f1078fd7591 in do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at kernel/qelapsedtimer_unix.cpp:166
#4  0x00007f1078fd7591 in qt_gettime() () at kernel/qelapsedtimer_unix.cpp:175
#5  0x00007f1078fd5dc9 in QTimerInfoList::updateCurrentTime() (this=this@entry=0x7f104c0373c0) at kernel/qtimerinfo_unix.cpp:91
#6  0x00007f1078fd63a5 in QTimerInfoList::timerWait(timespec&) (this=this@entry=0x7f104c0373c0, tm=...) at kernel/qtimerinfo_unix.cpp:388
#7  0x00007f1078fd53a4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f104c036a40, flags=...) at kernel/qeventdispatcher_unix.cpp:485
#8  0x00007f1078f7922a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f105991cc50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#9  0x00007f1078da0fda in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#10 0x00007f10734086b5 in  () at /usr/lib64/libQt5Qml.so.5
#11 0x00007f1078da2782 in QThreadPrivate::start(void*) (arg=0x7f105c06c350) at thread/qthread_unix.cpp:361
#12 0x00007f10749e5559 in start_thread () at /lib64/libpthread.so.0
#13 0x00007f107ba6081f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f1043766700 (LWP 5384)):
#0  0x00007f10749eb89d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1078da970b in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55e2166708e0) at thread/qwaitcondition_unix.cpp:146
#2  0x00007f1078da970b in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55e216668a20, deadline=...) at thread/qwaitcondition_unix.cpp:225
#3  0x00007f1078da9a19 in QWaitCondition::wait(QMutex*, unsigned long) (this=0x55e216668a28, mutex=0x55e216668a20, time=<optimized out>) at thread/qwaitcondition_unix.cpp:208
#4  0x00007f1073b8c3d8 in  () at /usr/lib64/libQt5Quick.so.5
#5  0x00007f1073b8c80a in  () at /usr/lib64/libQt5Quick.so.5
#6  0x00007f1078da2782 in QThreadPrivate::start(void*) (arg=0x55e2166689a0) at thread/qthread_unix.cpp:361
#7  0x00007f10749e5559 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f107ba6081f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f1042f65700 (LWP 3753)):
#0  0x00007f10749eb89d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1077ca87a4 in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f1077ca87e9 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f10749e5559 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f107ba6081f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f105889f700 (LWP 3667)):
#0  0x00007f107ba56176 in ppoll () at /lib64/libc.so.6
#1  0x00007f1078fd3991 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  0x00007f1078fd3991 in qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f1050000d18) at kernel/qcore_unix.cpp:132
#3  0x00007f1078fd3991 in qt_safe_poll(pollfd*, unsigned long, timespec const*) (fds=0x7f1050000d18, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153
#4  0x00007f1078fd509e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:500
#5  0x00007f1078f7922a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f105889ec50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f1078da0fda in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007f10734086b5 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f1078da2782 in QThreadPrivate::start(void*) (arg=0x55e216580e00) at thread/qthread_unix.cpp:361
#9  0x00007f10749e5559 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f107ba6081f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f105afe2700 (LWP 3609)):
#0  0x00007f107ba56176 in ppoll () at /lib64/libc.so.6
#1  0x00007f1078fd3991 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/bits/poll2.h:77
#2  0x00007f1078fd3991 in qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7f105400f818) at kernel/qcore_unix.cpp:132
#3  0x00007f1078fd3991 in qt_safe_poll(pollfd*, unsigned long, timespec const*) (fds=0x7f105400f818, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:153
#4  0x00007f1078fd509e in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:500
#5  0x00007f1078f7922a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f105afe1c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007f1078da0fda in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#7  0x00007f1072275d55 in  () at /usr/lib64/libQt5DBus.so.5
#8  0x00007f1078da2782 in QThreadPrivate::start(void*) (arg=0x7f10724edd80) at thread/qthread_unix.cpp:361
#9  0x00007f10749e5559 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f107ba6081f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f107c0ce940 (LWP 3595)):
[KCrash Handler]
#6  0x000055e218a20bf0 in  ()
#7  0x00007f107b58371a in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /usr/lib64/libkwin.so.5
#8  0x00007f1078f77ddf in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) (this=<optimized out>, eventType=..., message=message@entry=0x55e218a1a2b0, result=result@entry=0x7ffd986bcf38) at kernel/qabstracteventdispatcher.cpp:484
#9  0x00007f1062e6b60c in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (this=this@entry=0x55e21632fc90, event=event@entry=0x55e218a1a2b0) at qxcbconnection.cpp:533
#10 0x00007f1062e6c373 in QXcbConnection::processXcbEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55e21632fc90, flags=...) at qxcbconnection.cpp:1030
#11 0x00007f1062e929fc in QXcbUnixEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55e216391830, flags=...) at qxcbeventdispatcher.cpp:61
#12 0x00007f1078f7922a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd986bd0d0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#13 0x00007f1078f823d0 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1364
#14 0x00007f107bd2b60b in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#15 0x00007f107b988f4a in __libc_start_main () at /lib64/libc.so.6
#16 0x000055e215e037fa in _start ()
[Inferior 1 (process 3595) detached]

Reported using DrKonqi